Pulley.



- R. H. BOWEN.

PULLEY.

APPLIOATION FILED JULY 19, 1910. I 7 1,027,639. Patented May 28,1912.

Imwyvtor COLUMBIA PLANooRAPH 60.. WASHINGTON, D c

2 UNITED STATES PATENT OFFICE. RUSSELL H. BOWEN, or PALMYEA, JERSEY, AssIoNoE TO THE AMERICAN PULLEY COMPANY, or PHILADELPHIA, PENNSYLVANIA, A CORPORATION 0E PENNSYLVANIA.

IPULLEY.

Patented May 28, 1912 Application filed July 19,'1910.- Serial No. 572,680.

To all whom it may concern: K

Be it known that I, RUSSELL H. BOWEN, of Palmyra, county of Burlington, and State of New Jersey, have invented new and use ful Improvements in Pulleys, whereof the following is a specification, reference being had to the accompanying drawings.

My invention relates to that class of pulleys in which insets of cork, or other ma terial having a relatively high coefiicient of friction, are employed, and the object of my invention is to simplify the construction of such pulleys, and'at the same time to insure, proper support for the insets against inwardi pressure, in a radial direction, and to hold them against lateral displacement.

In the drawings, Figure 1, represents a sidev elevation of a pulley embodying my invention; Fig. II, being an axial section thereof on the line II, II, of Fig. I.

The pulley comprises a hub portion 1,

to which are attached a plurality ofspokepairs 2, 2, converging symmetrically toward themedian plane of the pulley as shown in the sectional view.

The rim of the pulley isiformed of an integral piece of sheet metal, folded back, or returned upon itself, as shown in Fig. II, so as to constitute an outer rim 3, and an inner rim 4, with an interspace 5, of substantial radial depth between them. The edges of the metallic sheet which forms the inner rim, are bent abruptly into flanges {3, and 7 which extend radially inward adstructure, and are received between the outer ends of the spoke-pairs 2,2, and are there secured by means of rivets 8.

At suitable intervalsin the outer rim-3, I form a plurality of holes 10, of a proper size to receive the insets 12, of cork or other material, which are of slightlylarger diameter than the holes, so that when forced into position, the material can expand in the interspace 5, beneath the" edges of the holes 10, and thus insure a firm grip.

I am aware that it is not new to provide however, the continuity of the inner and outer rims attained by folding the sheet metal back upon itself, afl'ords not only great Bopies of this patent maybeobtained for acent to the median plane of the pulley v structural strength with a given weight of metal, but is highly economical to manufacture, and aflords the proper conditions for maintaining the insets in position against displacement. I also am aware that it is not broadly new to construct the rim of a pulley oftwo thicknesses of metal lying in close contact with one another. The characteristic of a pulley, embodying my invention is that a substantial and definite interspace is left between the outer and inner rims for the purposes and with the results above set forth.

In the drawings and foregoing description I have specified what is commercially termed a whole pulley, as distinguished from a divided pulley, made in two similar half parts, secured together at the rim and at the hub.

My invention is of course adapted for use in connection with such divided pulleys, and

it will, therefore, be understood that in applying the term integral to the rim, I do not mean that the entire circumference must necessarily be made in one piece, but that the metal of the outer rim is integral with that of the inner rim, throughout either the whole pulley, or each part thereof.

Having thus described my invention, I "claim:

I The combination of a hub; a plurality of spokes mounted thereon; a rim of sheet metal folded back upon itself to form an O11t61 rim and an inner rim integral there with, but separated therefrom by an interspace of substantial radial depth, the edges of the metal of said inner rim being provided with flanges extending radially inward adjacent to the median plane of the pulley, said flanges being attached to the outer ends of the spoke members; the outer rim being provided with a plurality of holes; and insets of material having a rela tiyely high coefiicient of friction, arranged "within said holes, the inner ends of the insets resting upon the surface of the inner rim, substantially as set forth.

In testimony whereof, I have hereunto signed myname, at Philadelphia, Pennsyl Qvania, this fifteenth day of July 1910.

i RUSSELL H. BOWEN;

, Witnesses:

JAMES H. BELL, 'E. L. FULLERTON. 

